WebCore/storage/OriginUsageRecord.h

   1 /*
   2  * Copyright (C) 2008 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  14  *     its contributors may be used to endorse or promote products derived
  15  *     from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28 #ifndef OriginUsageRecord_h
  29 #define OriginUsageRecord_h
  30
  31 #include "PlatformString.h"
  32 #include "StringHash.h"
  33
  34 #include <wtf/HashMap.h>
  35 #include <wtf/HashSet.h>
  36
  37 namespace WebCore {
  38
  39 // Objects of this class can be used from multiple threads with external synchronization.
  40 // String arguments are also supposed to be deeply copied by the caller when necessary.
  41 class OriginUsageRecord {
  42 public:
  43     OriginUsageRecord();
  44
  45     void addDatabase(const String& identifier, const String& fullPath);
  46     void removeDatabase(const String& identifier);
  47     void markDatabase(const String& identifier); // Size may have changed, and will need to be recalculated.
  48     unsigned long long diskUsage();
  49
  50 private:
  51     struct DatabaseEntry {
  52         DatabaseEntry() { }
  53         DatabaseEntry(const String& filename) : filename(filename) { }
  54         DatabaseEntry(const String& filename, unsigned long long size) : filename(filename), size(size) { }
  55         String filename;
  56         unsigned long long size; // This member remains uninitialized until disk usage is calculated.
  57     };
  58     HashMap<String, DatabaseEntry> m_databaseMap;
  59     HashSet<String> m_unknownSet;
  60
  61     unsigned long long m_cachedDiskUsage;
  62     bool m_cachedDiskUsageIsValid;
  63 };
  64
  65 } // namespace WebCore
  66
  67 #endif